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GOVERNMENT HS JAWAHARCOLONY, STD 5, BASIC SCIENCE, , The requirements for the germination of seeds., Is soil required for the germination of seeds?, Aim :, To find out whether soil is required for germination of seeds., Materials required:, Disposable glass, pea seeds, cotton, water, Procedure:, • Put small holes at the bottom of the disposable glass., • Take some cotton in the glass and put four or five pea, seeds., • Pour some water in the cotton., • Keep the glass open in sunlight., Observation :, Pea seeds are sprouted within three or four days., Inference :, Soil is not essential for the germination of seeds., , Is water required for the germination of seeds?, Aim :To find out ,whether water isrequired for thegerination of seeds., , Materials required: Disposable glass, pea seeds, cotton, soil., Procedure : Fill a disposable glass with completely dry soil. Put four or, five pea seeds in it. The seeds should get normal air, light
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and atmospheric temperature., Observation : Pea seeds are not sprouted, Inference : Water is essential for the germination of seeds., , Is sunlight required for the germination of seeds?, Aim :To find out ,whether sunlight isrequired for thegerination of seeds., Materials required: Disposable glass, pea seeds, cotton, soil.water,cardboard, box,cellotape., Procedure : sunlight necessary for the germination of seeds?, Put some soil in a disposable glass having holes at its base. After putting some, pea seeds, pour some water. Place the glass in a cardboard box and cover it in, such a way that sunlight never enters it., Observation :peeds are sprouted., Inference :Sunlight is not essential for the germination of seeds., , For seeds to germinate, Air, water and favourable temperature are essential for the, germination of seeds. Sunlight and soil are required for growth after, sprouting., Classify the following factors into those that are required and those, that are not required for the sprouting of seeds., • Air, , • Favourable temperature, , • Water, • Sunlight, , • Soil, , Answer:, Factors required for sprouting of Factors not required for sprouting, seeds, of seeds, Air, Water, Favourable temperatur, , • Soil, • Manure, • sunlight, Germination of Seeds
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●, , Germination is the process of the embryo inside the, seed growing into a seedling under favourable circumstances, plumule, cotyledon, , radicle, , Radicle, The first to come out from the sees during germination is called radicle.Radicle, grows in to the soil and forms root., , Plumule :, The plumule is the portion that grows upwords from the embryo.The plumule grows, in to stem., , Cotyledon:, The germinating seed uses the food of cotyledon until the leaves grow enough to, synthesise food., , Classify the different plants seen around you on the basis of mode of, formation of plantlets., Seed, , Stem, , Leaves, , Root, , Chrysanthemum, , Crape Jasmine, , Bryophyllum, , Sandalwood tree, , (Mallika), , (Nanthyarvattom) (Ilamulachi), , (Chandanam), , cucumber, , pepper plant, , Queen of night, , curry leaf, , Spinach, , Sweet potato, , Bigonia, , Breadfruit, , jack tree, , Rose, , Anjili
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Mahogony, , Jasmine, Hibiscus, , Vegetative propagation, Vegetative propagation is the formation of new plants from vegetative parts of plants, like root, stem and leaf., , Dispersal of seeds, If all the seeds of a plant germinate at the base of the plant itself, they may not get, sufficient soil, water, sunlight or mineral salts for their growth. Hence seeds are to, be dispersed to different places. This enables a plant to reach and grow in different, places. The presence of different plants at one place is also due to seed dispersal., , Different modes of seed dispersal, • Through wind and water, • By birds and animals, • By bursting., Adaptations for seed dispersal, ➢, , By wind, , Seeds are lighter and have hairy partsin them, ➢, , By water, • They can float on water, • They dont decay even when they are in water for few days, , ➢, , by birds and animals, • They have fleshy fruits, • Gum in seeds, • Seeds having pointed tips, • Hooks to stick on bodies of animals, , ➢, , By bursting, , Have pods that explose when ripe.
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Classify them on the basis of the mode of dispersal of their seeds and, tabulatethem in the science diary. Find and add more examples to each, category., Mode of seed dispersal, , Plants, , Adaptations, , Through wind, , Pappus, Mahogany, , Light seed, Hair like parts to fly, have parts that helps to, fly, , Through animals, , Ficus, Jack tree, fleshy fruits, Guava tree, Arrow grass Gum in seeds, Seeds having pointed tips, Hooks, , Through water, , Coconut, , float on water, They dont decay even, when they are in water for, few days, , By bursting, , Lady's finger, Balsam, , Have pods, , Agricultural crops, , Place of origin, , Pineapple, Tapioca, Tomato, Potato,, Green chilly, Guava, Papaya, Coffee, , America, , Tea, , China, , Cabbage, , Europe, , Rubber, Cashew tree, , Brazil, , what are the benefits of having vegetable garden?, • Dishes with better vegetables., • Knowledge about different stages of vegetable cultivation., • Pesticide-free vegetables.
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• Employment opportunities and financial gains., , What are the factors to be taken care of while making a vegetable, garden?, • Seeds should be of high quality., • Soil should be fertile and should have good drainage., • Sunlight should be adequate., • Sufficient water should be made available., • Proper manuring, pest control, weed control etc. should be taken care of.
